== sanity test 101a: check read-ahead for random reads === 12:28:16 (1772472496) nreads: 10000 file size: 96MB 180.259306s, 2.58895MB/s osc.lustre-OST0000-osc-ffff938b86861800.rpc_stats= snapshot_time: 1772472702.075570573 secs.nsecs start_time: 1772472498.438181361 secs.nsecs elapsed_time: 203.637389212 secs.nsecs read RPCs in flight: 0 write RPCs in flight: 0 DIO RPCs in flight: 0 pending write pages: 0 pending read pages: 0 read write pages per rpc rpcs % cum % | rpcs % cum % 1: 0 0 0 | 0 0 0 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 0 0 0 | 0 0 0 read write offset rpcs % cum % | rpcs % cum % 0: 0 0 0 | 0 0 0 read write RPC latency (us) count % cum % | count % cum % 0: 0 0 0 | 0 0 0 osc.lustre-OST0001-osc-ffff938b86861800.rpc_stats= snapshot_time: 1772472702.077288377 secs.nsecs start_time: 1772472498.438211353 secs.nsecs elapsed_time: 203.639077024 secs.nsecs read RPCs in flight: 0 write RPCs in flight: 0 DIO RPCs in flight: 0 pending write pages: 0 pending read pages: 0 read write pages per rpc rpcs % cum % | rpcs % cum % 1: 0 0 0 | 0 0 0 2: 0 0 0 | 0 0 0 4: 0 0 0 | 0 0 0 8: 4 0 0 | 0 0 0 16: 4658 99 100 | 0 0 0 32: 0 0 100 | 0 0 0 64: 0 0 100 | 0 0 0 128: 0 0 100 | 0 0 0 256: 0 0 100 | 0 0 0 512: 0 0 100 | 0 0 0 1024: 0 0 100 | 25 100 100 read write rpcs in flight rpcs % cum % | rpcs % cum % 1: 4662 100 100 | 25 100 100 read write offset rpcs % cum % | rpcs % cum % 0: 5 0 0 | 1 4 4 1: 0 0 0 | 0 0 4 2: 0 0 0 | 0 0 4 4: 0 0 0 | 0 0 4 8: 0 0 0 | 0 0 4 16: 4 0 0 | 0 0 4 32: 7 0 0 | 0 0 4 64: 12 0 0 | 0 0 4 128: 21 0 1 | 0 0 4 256: 45 0 2 | 0 0 4 512: 98 2 4 | 0 0 4 1024: 178 3 7 | 1 4 8 2048: 405 8 16 | 2 8 16 4096: 773 16 33 | 4 16 32 8192: 1521 32 65 | 8 32 64 16384: 1593 34 100 | 9 36 100 read write RPC latency (us) count % cum % | count % cum % 0: 0 0 0 | 0 0 0 1: 0 0 0 | 0 0 0 2: 0 0 0 | 0 0 0 4: 0 0 0 | 0 0 0 8: 0 0 0 | 0 0 0 16: 0 0 0 | 0 0 0 32: 0 0 0 | 0 0 0 64: 0 0 0 | 0 0 0 128: 0 0 0 | 0 0 0 256: 0 0 0 | 0 0 0 512: 0 0 0 | 0 0 0 1024: 0 0 0 | 0 0 0 2048: 0 0 0 | 0 0 0 4096: 59 1 1 | 0 0 0 8192: 1851 39 40 | 0 0 0 16384: 2171 46 87 | 0 0 0 32768: 645 13 101 | 0 0 0 65536: 46 0 102 | 20 80 80 131072: 0 0 102 | 5 20 100 262144: 0 0 102 | 0 0 100 524288: 0 0 102 | 0 0 100 1048576: 0 0 102 | 0 0 100 2097152: 0 0 102 | 0 0 100 4194304: 0 0 102 | 0 0 100 8388608: 0 0 102 | 0 0 100 16777216: 0 0 102 | 0 0 100 33554432: 0 0 102 | 0 0 100 67108864: 0 0 102 | 0 0 100 134217728: 0 0 102 | 0 0 100 268435456: 0 0 102 | 0 0 100 536870912: 0 0 102 | 0 0 100 1073741824: 0 0 102 | 0 0 100 llite.lustre-ffff938b86861800.read_ahead_stats= snapshot_time 1772472702.109095436 secs.nsecs start_time 1772472498.483400889 secs.nsecs elapsed_time 203.625694547 secs.nsecs hits 69882 samples [pages] misses 4662 samples [pages] readpage_not_consecutive 7117 samples [pages] zero_size_window 69882 samples [pages] failed_to_fast_read 4662 samples [pages] readahead_pages 4662 samples [pages] 4 15 69882